First, you need to become a lawful permanent resident. Then, five years later, you can apply for US citizenship.

(213) 394-4554 x0 Mr. Shusterman is a former INS Trial Attorney (1976-82) with over 35 years of immigration experience. His response to your question is general in nature, as not all the facts are known to him. You should retain an attorney experienced in immigration law to review all the facts in your case in order to receive advice specific to your case. Mr. Shusterman's statement above does not create an attorney/client relationship.

Att. number 917-885-2261 This advice does not create an attorney client relationship. No specific legal advice may be offered by the lawyer until a conflicts check is undertaken. Information sent through a web form or via email may not be treated as confidential. Please accept my apologies for spelling mistakes.
Law Office of Alena Shautsova , New York Immigration Attorney http://www.shautsova.com
Blog: http://www.russianspeakinglawyerny.com

You need be a legal permanent resident before you can apply for citizenship. If you fear return to your native country (you cite 'serious humanitarian consequences), then you may be able to apply for asylum. You need to immediately consult with an immigration attorney who practices in this area of law.